Driving mechanism for printing-presses.



C. P. STRITE.

DRIVING MECHANISM FOR PRlNTlN G PRESSES.

APPLICATION FILED APR. 1. m4.

1 17 1 ,554, Patented Feb. 15, 1916.

2 SHEETSSHEET I.

C. P. STRITE.

DRIVING MECHANISM FOR PRINTING PRESSES.

APPLICATION FILED APR. 1. 1914.

1,171,554. Patented Feb. 15,1916.

2 SHEETSSHEET 2- Wh/d UNITED STATES PATENT OFFICE. 1

CHARLES P. STRITE, OF MINNEAPOLIS, MINNESOTA, ASSIGNOB, BY. MESNEASSIGN- MENTS, TO HORTON MANUFACTURING COMPANY, OF MINNEAPOLIS,MINNESOTA,

A CORPORATION.

DRIVING- MECHANISM FOR PRINTING-PRESSES.

Specification of Letters Patent.

Application filed April 1, 1914. Serial No. 828,738.

To all whom it may concern:

Be it known that 1, CHARLES P. STRITE, a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements in DrivingMechanism for Printing-Presses, of which the following is aspecification.

My invention relates to driving mechanism for printing-presses and hasfor its object to provide a combined governor pulley and brake footcontrolled and operative to regulate the speed at which theprintingpress is driven and instantly to stop and brake the same whendesired.

The full objects and advantages of my invention will appear inconnection with the detailed description thereof and are particularlypointed out in the claims.

In the drawings, illustrating the application of my invention in oneform, Figure 1.

1s a vertical sectional view of my improved governor pulley and brake.Fig. 2 is a section on line 22 of Fig. 1 on a reduced scale. Fig. 3 is asectional plan view on line 3-3 of Fig. 1 on a reduced scale. Figs. 4and 5 are enlarged detail views of features of the machine.

As illustrated, the frame 10 of a job printing-press has journaledtherein a drive shaft 11, which, through pinion 12, operates the maindriving gear 13 of the printing-press in a well-known manner. By meansof arms 14 and 15 bridging the pinion 12, I rigidly secure to the frame10 a collar 16 provided with angularly-disposed cam faces 17, 18. Thecam 16 has thereon a sleeve hub 19 upon which is journaled to turnfreely a second collar or pulley 20 provided with engaging faces 21, 22complementally positioned in reference to faces 17 and 18 on collar 16,so that when the collar 20 is rotated upon the sleeve 19 the saidcomplemental engaging faces will have the effect of moving the cambodily along shaft 11. Slidable on shaft 11 is a ring or collar 23having socketed extensions 24, 25. A disk 26, having a flange 27thereon, is fast on shaft 11, and the hub 28 thereof is provided withextensions 29, 30

. means of springs 33 between washers 34 and 35 on the pins. The washers34 are fixed in position on the pins 31 and 32, while the washers 35 areslidable 'on said pins and engage arms 36 of crank levers pivoted at 37to the disk 26, pins 31 and 32 projecting Patented Feb. 15,1916.

through apertures 38 in said arms 36. The

action of the springs 33, through pins 31, 32 and collar 23 and anintervening set of collars 39 providing seats for ball bearings 40,forces the cam disk 20 against stationary cam disk 16. The levers 36have arms 41 adustably connected with shoes 42 curved to fit within therim 43 of belt ulley 44 loose on shaft 11. Each of shoes is carried onan arm 42 pivoted at 45 to the disk 26, and s provided with a weightedarm 46 which 1s also pulled outwardly by springs 47 Under ordinaryconditions the springs 47 hold the shoes 42 out of engagement withpulley disk 43, so that the belt pulley runs free on shaft 11 and doesnot operate to rotate the shaft. If, however, the cam disk 20 is turned,it will have the effect of forcing pins 31 and 32 inwardly so as tocause the collars 35 to be forced by springs 33 against.

vpulley increases, centrifugal forcewill tend,

to cause the weights 46 to move outwardly and thereby overcome thepressure of springs 33 and withdraw shoes 42 from engagement with theinside of rim 43, so that pulley 44 will slip over those shoes and notrotate disk 26 and shaft 11. By this means the speed of shaft 11 isgoverned. With this construction it is practicable to gradually applypressure to springs 33 so asto accelerate the machine slowly until thedesired speed is attained. This is a matter of peculiarly high advantagein the operatiop of a job printing-press, where it is always desirableto run slowly at the start until the work has been tested and iscertainly run-- RITE-g satisfactorily, when the speed may be su cientlyaccelerated. It is also a matter of great importance to stoptheprintingpress instantly when required. My improved pulley constructionmakes it practicable to stop the press with the same ac- 'rection. Inected with cam disk 20 by means of a cable drum for operativel tionwhich renders the driving pulley inoperative. To this end I rovideabrake-carrying member 48, pr erably having two arms 49 and 50 pivotallyconnected with the frame 10 at 51 and 52, as best shown in Figs. 2 and3. A crossbar 53 has a roller '54 journaled in a pair of lugs thereon,and roller 54 is held in engagement with a cam 55 on the outer face ofcollar 20 by means of a spring 56 with crossbar 53 and the fixed camdisk 16. Pivotally and adjustably carried by member 48 is a brake shoe57 engaging the inside of flange 27 on disk 26. The cam 55 is sopositioned u on cam member 20 that when sald member is in normalposition so that pulley 44 is inoperative, the cam 55 will, throughroller 54 and member 48, have forced brake shoe57 into engagement withrim 27 so as to hold the disk 26 stationary. When, however, the cammember 20 is rotated to render pulley 44 operative, such rotation willmove cam 55 so as to permit spring 56 to withdraw brake shoe 57 fromoperative engagement with rim 27.

To operate the disk 20, I journal a shaft 58 in the frame 10 and a fixedfriction disk stand 59, as shown in Figs. 1 and 3. Fast disks 60 and 61.A double extended treadle 64 is fast on shaft 58 outside of frame member10, through which, by use of the foot,

the operator may turn shaft 58 in either di- The disk 60 on shaft 58 iscon- 65, so that rotation of disk 60 will corres ondingly rotate disk20. B these means the pulley 44 may be rendere operative to the desiredextent and the brake 57 corre spondingly released, and conversely thepulley 44 may instantly be rendered inoperative and the brake 57simultaneously ap lied to terminate driving action and stop t e press atthe will of the operator.

I claim:

. 1. In combination with the drive shaft-of a printing ress, aower-operated pulley loose on sai shaft, a rake drum fast on the shaft,means associated with said brake drum with the pu ey to drive the shaft,said means comprising devices movable with the brake drum and. movablerelatively thereto for engagement with a portion of the ulley whereby agoverningcontrol of the drive shaft is effected, a brake coiiperatingconnecting the brake with said brake drum, and means under the ,controlof the operator for simultaneously 'shaft, a power-operated pulley looseon said shaft, a driving disk fast on the shaft, a braking devicepivotally' connected with a stationary member, means normally holdingsaid brake in engagement with a portion of the disk to hold said diskand shaft sta-.

tionary, a spring tending to'fs'wing said member upon its pivottowithdraw the braking action, and means for operatively connecting thedriving disk and the pulley so that the pulley may exercise a governingcontrol over the driving disk, actuation ofsaid connecting meansoperating to withdraw the brake-holding means and permit operation ofthe spring.

- 3. In a printing-press, a' main driving shaft, a power-operated pulleyloose on said shaft, a driving disk fast on the shaft havingalaterally-extended annular arm, an arm pivotally connected with astationary memer having a brakeshoe positioned to engage with said rim,means engaging said arm to hold said brake in engagement with the rimwhen the pulley and disk are disconnected, a spring tending to swingsaid arm upon its pivot to withdraw the brake, and means for operativelyconnecting the driving disk and thepulley, actuationof said connectingmeansoperating to withdraw the brake-holding means and permit operationof the spring.

y 4. In a printing-press, a main driving shaft, a power-operated pulleyloose on said shaft, a driving disk fast on the shaft, a pivoted brakemember adapted to engage a portion of said driving disk to hold the diskand shaft stationary, means .for operatively connecting the drivingdisk. and the-pulley so that the pulley may exercise a overning controlover the driving disk, an 'a rotary member under the control of theoperator for simultaneousl v wi'ithdrawing,the brake and actuating saiconnecting means.

' 5. In a printing-press, a driving shaft, a power-operated pulley looseon said shaft, a driving. diskfastfon the shaft, a

pivoted brake member adapted to engage a portion of said driving. diskto hold the disk.

and shaft stationary, means for operatively v connecting the drivingdisk the pulley.

so thatthe pulley may exercisea governing control'over the driving disk,a rotary mem' ber under the control of. the operatorforsimultaneous'lywithdrawing the brake. and actuating'said connectingmeans, and means for holding said rotary member wherever set.

6. In a printing-press, a main driving I shaft, a power-operated pulleyloose on said Shaft, a drivingdisk as ontheshaft, a m

pivoted brake member adapted to engage a. portion of said driving diskto hold the disk and shaft stationary, means for operatively connectingthe driving disk and the pulley so that the pulley may exercise agoverning control over the driving disk, a rotary member under thecontrol of the operator for simultaneously withdrawing the brake andactuating said connecting means, foot-controlled means for operating therotary member, and means for holding said rotary member wherever set.

7. In a printing-press, a main driving shaft, a power-operated pulleyloose on said shaft, a driving disk fast on the shaft, a pivoted brakemember adapted to engage a portion of said driving disk to hold the diskand shaft stationary, a rotary cam engageable with said brake member tohold the same operative, foot-controlled means for rotating the cammember to permit withdrawal of the brake device, and means 0perated byrotation of the cam member for operatively connecting the driving diskand the pulley so that the pulley may exercise a governing control overthe driving disk.

8. In a printing-press, a main driving shaft, means normallydisconnected there from to operate the drive shaft, a pivoted brakemember, a rotary member having means thereon for simultaneouslyrendering said driving means operative and controlling the brake member,a counter-shaft having a double foot pedal secured thereto for rotatingsaid shaft in either direction, a pulley disk on said shaft, a beltconnecting said pulley disk and rotary member, a stationary frictionmember, and means for holding the pulley disk in contact with thefriction member whereby the rotary member is held wherever set.

9. .In a printing press, a main driving shaft, a power-operated pulleyloose on said shaft, a driving member fast on the shaft having alaterally-extended annular rim, an arm pivotally connected with astationary member having a brake shoe positioned to engage with saidrim, a rotary member having a cam engaging said 'arm to hold said brakein engagement with the rim when the pulley and disk are disconnected, aspring tending to swing said arm upon its pivot to withdraw the brake,and means controlled by said rotary member for operatively connectingthe driving disk and the pulley, actuation of said rotary memberoperating to withdraw the cam and permit operation of the spring.

10. In a printing-press, a main driving shaft, a fixed ring surroundingsaid shaft and having a cam face, a rotary member surrounding the shaftand having a cam face spring-pressed in engagement with the cam face ofthe fixed member, driving means for the shaft, braking means for theshaft, means controlled by rotation of said rotary member forsimultaneously rendering said driving means operative and said brakeinoperative, and vice versa, and means under the control of the operatorfor rotating the rotary member.

In testimony whereof I aflix my signature in presence of two witnesses.

CHARLES P. STRITE.

I Witnesses:

A. J. S'mn'n, F. A. Wm'mmr.

